Investor skepticism toward the SEC’s May 2026 proposal to permit optional semiannual reporting via a new Form 10-S, rather than mandatory quarterly Form 10-Q filings, underpins the 83.5% market-implied probability that the requirement will not be removed. Record opposition exceeding 280,000 comment letters, predominantly from investors citing risks to timely disclosure, capital allocation efficiency, and market transparency, has intensified scrutiny of the plan. Chairman Paul Atkins and administration support remain, yet the proposal’s elective structure and pending review of economic analysis suggest substantial modifications or delays are likely before any final rule, with adoption not expected before late 2026. Traders are pricing in the structural barriers posed by institutional investor pushback and the absence of a finalized regulatory change.